Silver on the core of Pachamama

In other time Potosí was powerful and rich. Now it seems to be a reflection of its glorious past, but probably is its bitter history what makes this place so interesting. Five centuries ago the indian Diego Huallpa discovered silver on the Cerro Rico (Sumaj Orkho) and then the exploitation of the mountain and the indians by the spanish started. Today, mines´ works are still going on (although there´s no silver left) and the miners keep offering to "El Tío" some presents to protect themselves inside the mine like cigarettes or coca leafs...

Note: the translation for "el Tío" is "the uncle", but it makes reference to the demon.